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प्रश्न
In a dihybrid cross, if you get 9:3:3:1 ratio it denotes that ______.
विकल्प
The allels of two genes are segregating independently
It is a case of multiple allelism
It is a multigenic inheritance
The allels of two genes are interacting with each other
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उत्तर
In a dihybrid cross, if you get 9:3:3:1 ratio it denotes that the allels of two genes are segregating independently.
Explanation:
The 9:3:3:1 ratio observed in a dihybrid cross denotes that the alleles of two different genes are assorting independently of each other during gamete formation. This classic Mendelian dihybrid ratio demonstrates the law of independent assortment, which states that gene pairs located on different chromosomes segregate independently during meiosis, resulting in this phenotypic ratio in the F2 generation. Thus, each trait is inherited independently, producing four distinct phenotype classes in the ratio of 9 (both dominant traits) : 3 (dominant first, recessive second) : 3 (recessive first, dominant second) : 1 (both recessive).
संबंधित प्रश्न
Filling the blank based on the given relationship.
3 : 1 Monohybrid : : 9 : 3 : 3 : 1 : ______
What is a dihybrid cross? How did Mendel perform this cross?
A homozygous Tall plant (T) bearing red coloured (R) flowers is crossed with a homozygous dwarf plant (t) bearing white flowers (r):
(1) Give the Genotype and Phenotype of the F2 generation.
(2) Give the possible combinations of the gametes that can be obtained from the F2 hybrid.
(3) Give the dihybrid ratio and the phenotype of the offsprings of the F2 generation when two plants of the F1 generation above are crossed.
Test cross involves
The genotype of a plant showing the dominant phenotype can be determined by
Select the correct statement from the ones given below with respect to dihydrid cross
In a test cross involving F1 dihybrid flies, more parental type offspring were produced than the recombination type offspring. This indicates
Among the following characters which one was not considered by Mendel in his experimentation pea?
What is back cross?
Explain the law of dominance in a monohybrid cross.
Identify the statementls that is/are NOT the correct reason/s for Mendel's success in his hybridization experiments.
i. Each factor controlled the single trait and is located on separate chromosomes.
ii. In the pea plant, contrasting characters can be easily recognized.
iii. Mendel carefully recorded the number of plants of each type and expressed his results as ratios.
iv. Mendel performed biochemical assays for identifying the position of 'factors' on chromosome.
In a testcross involving F1 dihybrid flies, more parental-type offspring were produced than the recombinant-type offspring. This indicates ______.
A dihybrid condition is ______.
Mendel’s last law is ______.
The process of mating between closely related individuals is ______.
A fruit fly exhibiting both male and female traits is ______.
In a dihybrid cross, F2 phenotypic ratio is 13 : 3. It is case of ______.
Mendel’s Law of independent assortment holds good for genes situated on the ______.
In the F2 generation of a Mendelian dihybrid cross the number of phenotypes and genotypes are ______.
Each gamete carry ______.
According to the evolutionary theory, formation of a new species is generally due to
From the list given below, select the character which can be acquired but not inherited
How is the sex of a newborn determined in humans?
Two pea plants - one with round yellow seeds (RRYY) and another with wrinkled green (rryy) seeds produce F1 progeny that have round, yellow (RrYy) seeds.
When F1 plants are self-pollinated, which new combination of characters is expected in F2 progeny? How many seeds with these new combinations of characters will be produced when a total 160 seeds are produced in F2 generation? Explain with reason.
Sahil performed an experiment to study the inheritance pattern of genes. He crossed tall pea plants (TT) with short pea plants (tt) and obtained all tall plants in F1 generation.
When F1 plants were cross-pollinated with plants having tt genes, a total of 800 plants were produced. How many of these would be tall, medium height or short plants? Give the genotype of F2 generation.
Mendel's law of independent assortment is based on F2 ratio of:
Describe the dihybrid cross upto F2 generation as conducted by Gregor Mendel using pure lines of Garden Pea for characters-seed shape and seed colour.
Which scientist is known as the Father of Genetics for establishing fundamental principles of heredity through experiments on pea plants?
Which three scientists are credited with independently rediscovering Mendel's work in 1900?
